=+56. A manufacturer of dustless chalk monitors the consistency of chalk by running an s chart on

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=+56. A manufacturer of dustless chalk monitors the consistency of chalk by running an s chart on the density of chalk in subgroups of size 8. The most recent 24 such subgroups had the accompanying sample standard deviations (read across):

.204 .315 .096 .184 .230 .212 .322 .287

.145 .211 .053 .145 .272 .351 .159 .214

.388 .187 .150 .229 .276 .118 .091 .056

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Applied Statistics For Engineers And Scientists

ISBN: 9781133111368

3rd Edition

Authors: Jay L. Devore, Nicholas R. Farnum, Jimmy A. Doi

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